Not bad. Having not played the first one i can't really compare the two, however i cannot stop playing it! i love the easy play style of the controls, the decent graphics, range of levels and weapons.
my only dissapointment is having a fruit machine style unlock bonus scheme. It can be frustrating at times and brutal. facing a VS with nothing but a machine gun, mind you it was on hard.
overall i think its a buy, mixed gameplay, ok onlineand a great campaign.